Base for chairs, stands, and the like



4, 1931; E. C.,HARTER "1181 7,559-

BASE FOR CHAIRS, STANDS, AND THE LIKE Filed Nov. 9. 1927 s Sheets-Sheet 1 Aug. 4, 1931. E.-c. HARTER I BASE FOR CHAIR S, STANDS, AND THE LIKE Filed Ndv. 9. 1927 a Sheets-Sheet. 2

4 .N, r 2 /////fl///////4 1 a z W A l a I l I a I J I I II I I I u n 1 w Aug. 4, E; q- HARTER msn FOR cHAI Rs STANDS; AND THE LIKE Filed M051. 9, 1927 s Sheets-Sheet s 2 v 2 2 3 Z m A i W l M, W W V M a.

W M c 3 Patented Aug. 4, 1931 PATENT OFFICE EVAN c. HARTER. or scanners, MICHIGAN BASE FOR CHAIRS, STANDS, AND THE LIKE 7 Application filed November 9, 1927. Serial No. 232,053.

This invention relates to a base for chairs,

stands, tables and the like and is fully described in the following specification, and shown in the accompanying drawlngs, 1n

, which is readily rotatable and into which is x to Figure 1 is a side elevation of a chair embodying the invention;

Fig. 2 is a partially enlarged view on the line 2 of Fig. 1; i

' Fig. 3 is a partial enlarged vertical section on the line 3-3 of Figs. 2 and 4;

Fig. 4 is a'section on the line.4 of Fig. 3; Fig. 5 is a section on the line 5 of Fig. 3; Fig. 6 is a partial section similar to that shown in Fig. 4, but showing a modified form of'leg; i

Fig. 7 is a side elevation of a form of base particularly adapted for tables and the like; and I Fig. 8 is a partial enlarged vertical section through the same similar to Fig. 3.

The embodiment shown in Fig.1 comprises a base 10 and a seat 11 which is swivelly mounted thereon as will hereinafter be described.

The base 10 c'onslsts essentially oflegs'12 which converge at the top and are secured by a frame which is represented generally by the letter A. This frame carries a nut 13 threaded a screw 14 which has a reduced upper end 15 which is threaded to receive a nut 16and holding the seat 11.

Where this device is intended to be used for other purposes such as for supporting a stand (not shown) or the like the seat 11 is omitted and the shaft 14 is made as long as desired. The upper and lower clamping members composing a frame A are preferably similar, each being in the-form of a hollow member, or cage,made up of a pressed steel member 17 which is of a general rectangular form with openings 18 at the corners which are adapted to receive the legs 12. Themember 17 has downwardly extending aprons 17 within which lies the stamped metal member 19 which is positioned with respect to the member 17 by means of a shouldered tubular miember 20 through which. passes the shaft turn with the shaft.

Thus it will be seen that each of the members 17 is hollow and within it lies a starshaped member 21 having tongues 22, each adapted to pass through slots 23 in the legs .12 and having openings 24 through which may be driven wedges 25 to rigidly clamp the legs to the. frame A. These legs are closed at their upper ends by means of disks 12 so as to improve the appearance and to make it difficult to understand howthe whole is assembled. I

- In Fig. 6 is shown a modified form of the device in which the leg 12 is made of angle iron. The member 17 must accordingly be modified to fit its contour. The member 21 has tongues 22 which pass through slots 23 in the leg 12' and has an opening 24 through which passes a wedge25 of a size and shape to cause'the leg l2 to'be drawn rigidly against the frame A. 26 depends from the lower tubular member 20 which serves as a protection to the protruding lower end of the shaft 14 and also prevents anyone sitting on the chair from striking the threaded lower shaft with their heels. The nut 13 rests upon a washer 27 which has an inwardly projecting ear 28 as shown in Fig.5 which engages a longitudinal keyway 29 in the shaft 14. i y l Thus it will be seen that any weight resting on the shaft 14 will force the nut down into contact with the washer 27 whichbecause of the key-way 29 and ear 28 is also forced to In this way no friction due to bearing of the washer 27 upon the lower member 17 is transmitted to the nut 13 which will thus always remain in its adjusted position.

For the purpose of adjusting this nut however a hole 13 is drilled or otherwise 9 formed in its periphery so as to receive a tool by which it can be held while the shaft 14 is rotated so as to run it either up or down to effect the desired adjustment.

The base shown in Figs. 7 and 8 consists of legs 31 having relatively long upper vertical portions 31 which are secured together at the top by pressed steel members 32 which are identical withthose shown in In both these forms a sleeve Fig.1, as is alsd'thmethod. of securing them The pin 33 is operated by means of a lever which is pivotally mounted at 36. Three positions of the pin are indicated- The position l1 in full lines shows the pin entirely withdrawn so as to permit both the screw M and the nut 13" to be turned, the washer 27 under the nut having a tongue 27 extending into the key-way 29 so as to cause the washer 27 to rotate with the screw.

If the lever 35 is moved so as to force the pin 33 into the position 2 2. shown in dotted lines the pin will hold the nut 13" and prevent its rotation so that by turning the screw 14 the latter can be screwed up or down through the nut so as to ve a ood adjusting position. \Vhen the desired height of the table, chair or stand is obtained, the pin 33 may again be withdrawn after which the screw 14 is completely rotatable without changing its position vertically.

The pin 33 is positioned through the opening 33 to the dotted line position 3-3, the end of the pin lies within the key-way 29 and the screw or shaft 14 cannot be turned. It is sometimes desirable to do this in order to prevent rotation of the table top or chair.

While no means is shown for holding the pin in any of these adjusted positions, it

will be understood that various means for lockin g it in these adjusted positions can read ily be applied. 7 I

Thus it will be seen that a ver simple and economical form of base is provided which lends itself very well to use on chairs, tables, stands and the like and one which can be very simply ant. economically manufactured.

lVhile I have shown and described but a few embodiments of this invention, it is to be understood that it is capable of many other modifications. Changes therefore in the construction and arrangement may be made which do not depart from the spirit and scope of the invention as disclosed in the ap' pended claims. 7

I claim:

1. In a base for chairs and the like, a vertical threaded shaft, spaced clamping members having openings for said shaft, said members having the forms of polygons and notched at their corners, a leg for each corner fitting in said notches and extending downwardly and outwardly therefrom, said legs being tubular and having slots therein, members having tongues extending through said slots, means in said legs'associated with said tongues for securing said legs to said clamping members, and a nut for said threaded shaft between said clamping members.

2. In a base for chairs and the like, a vertical threaded shaft, spaced clamping members having openings for said shaft, said members having the forms of polygons and notched at their corners, a leg for each corner fitting in said notches and extending clownwardly and outwardly therefrom, said legs being tubular and having slots therein, members having tongues extending through said slots and having openings extending beyond said slots, wedges driven into said openings to draw the legs firmly into said notches, and a nut for said threaded shaft between said clamping members.

8, In a base for chairs and the like, a vertical threaded shaft, spaced clamping members having openings for said shaft, said members having the forms of polygons and notched at their corners, a leg for each corner fitting in said notches and extending downwardly and outwardly therefrom, said legs having a thin metal wall containing slots, members having tongues extending through said slots and having openings extending beyond said slots, wedges driven into said openings to draw the legs firmly into said notches, and a nut for said threaded shaft between said clamping members.

l. In a base for chairs and the like, a vertical threaded shaft, spaced clamping members, three or more legs secured in notches in said clamping members and extending downwardly and outwardly therefrom, a nut screwed on said shaft and rotatably positioned between said members and containing a hole, a key-way in said shaft, and a pin slidable in the base to enter said hole and hold the nut while the shaft is rotated and movable intothe key-way and prevent the shaft from turning.

5. In a base for chairs and the like, a central vertical rod, a vertical series of hollow frame-like members through which said rod extends, three or more legs having lateral openings, said members containing recesses into which said le s extend, members surrounding'said rod and located in said firstnamed members and having outwardly extending projections containing openings and projecting through the openings in said legs, and clamping members in the openings in said projections and hearing at lateral edges thereof against said legs and firmly pressing said legs against said first-named members.

6. In a base for chairs and the like, a central vertical rod, a vertical series of hollow frame-like members through which said rod extends, three or more hollow "legs having openings in their side walls, said members containingrecesses into which saidllegs extend, members surrounding said rod and located in said first-named members and having outwardly extending proj ections containing openings and projecting through the openings in said legs, and clamping members in the openings in said projections and bearing at lateral edges thereof against the inner surfaces of said legs and firmly pressing said legs against said first-named members. a

7. In a base for chairs and the like, a cen- I tral vertical rod, a Vertical series of hollow frame-like members through which said rod extends, three or more legs having lateral openings, said members containing recesses into whichsaid legs extend, members loosely surrounding said rod and located in said first-named members and having outwardly extending projections containing openings and projecting through the openings in said legs, and clamping members in the openings in said projections and hearing at lateral edges thereof against said legs and firmly pressing said legs against said first-named members.

In testimony whereof, I have hereunto set my hand this 2nd day of November, 1927.

EVAN G. HARTER. 

